« previous next »

Author Question: Calico cats are female because A) the males die during embryonic development. B) (Read 628 times)

Hungry!

  • Hero Member
  • *****
  • Posts: 1,071
on: Jun 21, 2013
Calico cats are female because
A) the males die during embryonic development.
B) a male inherits only one of the two X-linked genes controlling hair color.
C) the Y chromosome has a gene blocking orange coloration.
D) only females can have Barr bodies.
E) multiple crossovers on the Y chromosome prevent orange pigment production.


camila

  • Hero Member
  • *****
  • Posts: 705
Reply #1 on: Jun 22, 2013
100% it's B, don't forget to gimmi a thumbs up :D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Hungry!

  • Hero Member
  • *****
  • Posts: 1,071
Reply #2 on: Aug 13, 2013
Thanks so much, you were right on.


« previous next »
 

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Male and female I. ricinus Male and female I. ricinus
Timing of teratogens. Vulnerability to teratogens is greatest in the embryonic period. Source: Moore Timing of teratogens. Vulnerability to teratogens is greatest in the embryonic period. Source: Moore
Milestones of Infant Language Development Milestones of Infant Language Development
Development of Morality in Young Children Development of Morality in Young Children
Embryonic Period Embryonic Period
Comparison of the Duration of Meiosis in Males and Females Comparison of the Duration of Meiosis in Males and Females
Video: Basic rhythm - control centers in medulla oblongata, spirograph and normal tidal cycle

For a complete list of videos, visit our video library